Improvement in kitchen-boilers



. B. vSCAIFEl Domestic Boiler.

Patented Oct. 18, 1870.

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UNITED STATES PATENT OEEIOE.

WILLIAM B. SCAIFE, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN KITCHEN-BOILERS.

Specification forming part of Letters Patent No. 108,524, dated October 1S, 1870.

To all whom it may concern:

Beit known that I, WILLIAM B. SCAIFE, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Kitchen-Boilers, the same being a new article of manufacture; and I do hereby declare the following is a full and exact description thereof, reference being had to the accompanying drawing, and to the letters otl reference marked thereon.

The nature of myinif'ention consists iu making a new article otl manufacture-viz., a kitcheirboiler having the ends first secured to it by means ot' rivets, and the joints around the rivets and the ends of the boiler subsequently immersed in a bath of muriate of zinc, and then in a bath of molten solder, and finally soaking7 the joints with soft solder, as hereinafter described.

To enable others skilled in the art to make and use my invention, I will proceed to def scribe my method ot' constructing kitchenboilers.

1n the accompanying drawing, which forms part of my speciiication, Figure l represents the boiler suspended so that the lower end of its shell and the iiange Ot' its bottom are immersed in a bath of muriate of zine. Fig. 2 represents the boiler, at'te'r being removed from the bath of muriate of Zinc, suspended and immersed in like manner in a bath Ot' molten solder. Fig. 3 represents the boiler after being removed from the bath of molten solder, with its bottom end inverted for the purpose ot' elosin the joint between the shell and flange of the bottom by what is known among tinners, plumbers, and gas-titters as the soaking process.7

In t-he accompanying drawing, A represents a bath of muriate of zinc, (zinc held in solution by muriatic acid.) B represents a furnace, provided with a vessel, C, for melting solder. l) represents a block provided with a concavity for receiving the upper end of the boiler and holding it in an inverted position, as shown in Fig. 5.

The shell c ot' the boiler is constructed in the ordinary manner, except that the joint or seam j' is riveted and then brazed. The domeshaped head g, or other form of head, is then itted and riveted to its place in the shell e. The bottom h. is then fitted in, the shell marked and then removed from it, and openings for the rivets punched in the flange i. After the several parts are thus constructed and prepared, the shell A and its head g are galvanized with zinc; also the bottom h and the rivets to be used for securing it in the shell.

After the several parts are galvanized, by the well-known art of galvanizing iron., the bottom 7L is riveted to its place in the shell A. The boiler is then suspended so that the lower end of theshell A and the flange z' ofthe bottom h shall be immersed in a bath of muriate Ot zinc, as shown in Fig. 1. After remaining in this bath for one or two minutes it is re moved from it, and jarring ott the surplus ot' the muriate of zinc adhering to it, the same parts of the boiler are immersed in the molten solder, as shown in Fig. 2. l

After remaining in the molten solder for a short time, the boiler is removed and inverted, as shown in Fie. 3. The operator then takes a stick of solder, and, placing one end of it on the joint or seam between the iiange and the shell c, moves it slowly around on the joint or seam, thereby melting the solder and soaking it into the joint or seam, through the medium of the heat which the parts acquired while immersed in the molten solder, thus making the boiler its own soldering-iron, for the purpose ot' forming a soaked joint or seam between the iiange ot the bottom and shell of the boiler.

By constructing kitchen-boilers by the method hereinbefore described, the manufacturer is enabled to make a cheap, durable, and perfectly steam-tight boiler without resorting to slow and vexatious process of calkin g and testing now in common use.

Having thus described the nature, construction, and advantages of my new article of mannfacture and method for constructing kitcheri-boilers, what I claim as my invention is- A new article of marmfacture-viz., a kitchen-boiler having the ends irst secured in it by rivets, and the joints around the rivets and ends ofthe boiler subsequently immersed in a bath Of muriate ot zinc, and then in a bath of molten solder, and finally soaking the joints with soft solder, as herein described, and for the purpose set forth.

W. B. SCAIFE.

Witnesses A. C. JOHNSTON, J AMES J. JOHNSTON. 

